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Nuclear Theory

arXiv:nucl-th/0503054 (nucl-th)
[Submitted on 21 Mar 2005 (v1), last revised 9 Feb 2006 (this version, v3)]

Title:Probing the QCD equation of state with thermal photons in nucleus-nucleus collisions at RHIC

Authors:David d'Enterria, Dmitri Peressounko
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Abstract: Thermal photon production at mid-rapidity in Au+Au reactions at $\sqrt{s_{NN}}$ = 200 GeV is studied in the framework of a 2D+1 hydrodynamical model that describes efficiently the bulk identified hadron spectra at RHIC. The combined thermal plus NLO pQCD photon spectrum is in good agreement with the yields measured by the PHENIX experiment for all Au+Au centralities. Within our model, we demonstrate that the correlation of the thermal photon slopes with the charged hadron multiplicity in each centrality bin provides direct empirical information on the underlying degrees of freedom and on the equation of state, $s(T)/T^3$, of the strongly interacting matter.
Comments: Version to appear in EPJ-C (extended discussion and refs. and a few corrections)
Subjects: Nuclear Theory (nucl-th); High Energy Physics - Phenomenology (hep-ph); Nuclear Experiment (nucl-ex)
Cite as: arXiv:nucl-th/0503054
  (or arXiv:nucl-th/0503054v3 for this version)
  https://doi.org/10.48550/arXiv.nucl-th/0503054
Journal reference: Eur.Phys.J.C46:451-464,2006
Related DOI: https://doi.org/10.1140/epjc/s2006-02504-0

Submission history

From: David d'Enterria [view email]
[v1] Mon, 21 Mar 2005 18:38:59 UTC (67 KB)
[v2] Thu, 6 Oct 2005 17:10:44 UTC (65 KB)
[v3] Thu, 9 Feb 2006 12:01:29 UTC (85 KB)
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